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Finding the Fourth Proportional to 691,127.76, 953,760.74 and 385,223.57

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Solution

The fourth proportional to 691,127.76, 953,760.74 and 385,223.57 is: 531,610.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,127.76 : 953,760.74 = 385,223.57 : x
  2. Step 2: Convert to fraction form
    691,127.76/953,760.74 = 385,223.57/x
  3. Step 3: Cross multiply
    691,127.76x = 953,760.74 × 385,223.57
  4. Step 4: Simplify right side
    691,127.76x = 367,411,111,938.31
  5. Step 5: Solve for x
    x = 367,411,111,938.31/691,127.76
  6. Step 6: Final answer
    x = 531,610.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.